I followed the detailed video from @appliancepartsprosappliancepartspros. My Bosch Dishwasher showed an E20 code and when I tried to start it, it would make 2 faint clicks and stop. After installing the new circulation motor it now works.
However, if I try to run a Sanitize cycle, it does throw the E20 error. This is confusing. I ran with success a complete normal cycle and a Service Mode P1 Cycle, the Dishwasher performed normally.
We’ve been using the Dishwasher a few more times with success so I am considering the issue as resolved. However… someone posted in the youtube channel that an un-properly seated black wire connector to the pump could cause an E20. What are the things I need to further review beyond that wire/connector? Is it possible that I also need to replace the controller board? Is there a specific test to check the controller board?
I found this potentially useful video about resetting another controller connector. However, since the Dishwasher is currently performing satisfactorily, I am not messing around with it unless absolutely necessary:
